Arrow nock



FIG. 1 is a front elevational view of one embodiment of an arrow nock according to the present invention; and,

FIG. 2 is a cross sectional view thereof taken on line 2-2 of FIG. 1.

The broken lines showing portions of the arrow nock in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an arrow nock, as shown and described. 